METAL-CHELATE EQUILIBRIA OF T1+, UO22+, Th4+ WITH (L)2-AMINO-BUTANEDIOIC ACID-4-AMIDE IN AQUEOUS MEDIA

Interactions between T1+, UO22+, Th4+ and (L)2-amino-butanedioic acid-4-amide have been investigated at different temperature 25o, 35o and 45oC and ionic strengths u = [0m0, 0.1, 0.2, 0.5 and 1.0M KNO3] in aqueous media using a pH titration technique. The data suggest the formation of 1:1 complex with T1+ and UO22+ and 1:1 and 1:2 complexes with Th4+ ions in the pH range 6.3-9.2, 3.3-6.0 and 2.5-5.5 respectively. Formation constants have been evaluated employing Calvin and Melchior’s extension of Bjerrum’s method. The thermodynamic stability constants and other function –D Go, D Ho and D So accompanying complexation have also been evaluated

K K SAXENA ,R S SAXENA ,S SHARMA ,